The Swoole\Event class

(PECL swoole >= 1.9.0)

Introduction

The Swoole extension provides low-level interfaces to directly manipulate the underlying epoll/kqueue/poll/select event loop. It allows adding sockets created by other extensions or PHP's stream/socket extensions to Swoole's EventLoop.

Note: The Event module is low-level, being a basic encapsulation of epoll. Users should have experience with IO multiplexing programming.

Event Priority

Signal handler callback functions set via Process::signal
Timer callback functions set via Timer::tick and Timer::after
Deferred execution functions set via Event::defer
Periodic callback functions set via Event::cycle

Swoole Event Socket Type

fd int: File descriptors, including Swoole\Client->$sock, Swoole\Process->$pipe, or any other file descriptor (fd).
stream resource resource: Resources created by stream_socket_client/fsockopen.
socket resource resource: Resources created by socket_create from the sockets extension require the --enable-sockets flag during Swoole compilation.
object object: Swoole automatically converts Swoole\Process into UnixSocket and Swoole\Client into connected client sockets at the underlying level.

Class synopsis

class Swoole\Event {

/* Methods */

public static function add(
    mixed $sock,
    callable $read_callback,
    callable $write_callback = ?,
    int $flags = ?
): bool

public static function cycle(callable $callback, bool $before = false): bool

public static function defer(callable $callback_function): void

public static function del(mixed $sock): bool

public static function dispatch(): void

public static function isset(mixed $fd, int $events = SWOOLE_EVENT_READ | SWOOLE_EVENT_WRITE ): bool

public static function set(
    mixed $sock,
    callable $read_callback,
    callable $write_callback = ?,
    int $flags = ?
): bool

public static function wait(): void

public static function write(mixed $fd, mixed $data): bool

}

Swoole\Event::add — Add a socket to the underlying reactor event listener
Swoole\Event::cycle — Define a function to execute at the end of each event loop iteration
Swoole\Event::defer — Execute a function at the start of the next event loop
Swoole\Event::del — Remove a socket from reactor event listener
Swoole\Event::dispatch — Perform a single event loop iteration
Swoole\Event::isset — Check if a socket is being monitored in the event loop
Swoole\Event::set — Modify event listener callbacks and mask
Swoole\Event::wait — Start event loop
Swoole\Event::write — Write data to socket asynchronously

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